See also:

Rear Window Lockout
This feature prevents the rear passenger windows from operating, except from the driver position. The rear door locks will also be disabled and only operate from the driver door. This feature on ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...

Coverage
Services are provided up to 5 years/160 000 km (100,000 mi), whichever comes first. In the U.S., anyone driving the vehicle is covered. In Canada, a person driving the vehicle without permiss ...